重载铁路轨道不平顺谱构建与分析

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摘要 研究目的: 为掌握重载铁路轨道不平顺特征,基于重载轨道不平顺实测数据进行数据预处理与数字特征分析;利用Welch法对重载轨道不平顺谱进行估计;提出能表征重载不平顺谱特征的统一拟合模型,利用L-M算法对重载高低、轨向、水平和轨距不平顺谱进行拟合,得到平均谱拟合参数;并将重载不平顺拟合谱与现有不平顺谱进行对比分析。
研究结论: (1)重载铁路轨道不平顺数据具有平稳特性且基本服从正态分布;(2)所分析重载线路轨道几何状态整体较好,各类型不平顺谱的周期性波长成分不尽相同,但均含有1.90 m和1.15 m周期性成分;(3)拟合得到的轨道高低、轨向和水平不平顺谱大致与德国低干扰谱相当,轨距不平顺谱则整体差于德国高干扰谱;(4)本研究成果可为我国重载铁路轮轨动力学仿真分析和重载铁路养护维修管理提供理论参考。

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	高建敏
	赖思成

关键词 ：重载铁路, 轨道不平顺, 功率谱密度, 非线性拟合

Abstract：Research purposes: In order to master the characteristics of track irregularity of heavy haul railways, data preprocessing and digital characteristics analysis were carried out based on measured data of track irregularity on heavy haul railways. The different types of irregularity spectrum of heavy haul railways were estimated by Welch method. A uniform fitting model was proposed to characterize the spectrum characteristics of track irregularity, Levenberg-Marquart algorithm was used to fit track vertical profile, alignment, cross-level and gauge irregularity spectrums of heavy haul railway, and the average spectral fitting parameters were obtained. The fitting spectrums of track irregularities of heavy haul railway were compared with those of existing track irregularity spectrum.
Research conclusions: (1) The track irregularity data of heavy haul railway has a stationary characteristic and basically obeys normal distribution. (2) The track geometry state of heavy haul railways analyzed is generally good, and the periodic wavelength components of different track irregularity spectrum are different, but all contain periodic wavelength components of 1.90 m and 1.15 m. (3) The track vertical profile, alignment and cross-level irregularity spectrums fitted are roughly the same as German low interference spectrum, while the gauge irregularity spectrum is generally worse than German high interference spectrum. (4) The research results can provide theoretical reference for the wheel-rail dynamic simulation analysis and maintenance management of heavy haul railways in China.

Key words： heavy haul railway track irregularity power spectral density non-linear fitting

收稿日期: 2021-06-25

PACS:

U211

基金资助:国家自然科学基金项目(51735012);牵引动力国家重点实验室自主研究课题(2019TPL-T10)

作者简介: 高建敏, 1981年出生,女,副研究员;^**赖思成,1996年出生,男。

引用本文:

高建敏, 赖思成. 重载铁路轨道不平顺谱构建与分析[J]. 铁道工程学报, 2022, 39(3): 32-39.
GAO Jianmin, LAI Sicheng. Construction and Analysis of Track Irregularity Spectrum of Heavy Haul Railway. Journal of Railway Engineering Society, 2022, 39(3): 32-39.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2022/V39/I3/32

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